Some of my PM colleagues have successfully passed the PMP exam by using PMP Exam Prep, 7th Edition, Rita’sCourse in a Book for Passing the PMP Exam. You can study this guide anytime and anywhere. However, you must be extremely motivated and disciplined to get through the course on your own time. My suggestion is to set up a study plan, to give yourself a deadline to complete the course, and to give yourself a deadline to take the PMP exam.